CN215064712U - NB-IoT intelligent water meter data acquisition terminal - Google Patents

NB-IoT intelligent water meter data acquisition terminal Download PDF

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CN215064712U
CN215064712U CN202120424473.XU CN202120424473U CN215064712U CN 215064712 U CN215064712 U CN 215064712U CN 202120424473 U CN202120424473 U CN 202120424473U CN 215064712 U CN215064712 U CN 215064712U
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data acquisition
terminal
acquisition terminal
communication
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杨大智
刘恒
樊建超
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Tianjin Snewsun Energy Technology Co ltd
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Tianjin Snewsun Energy Technology Co ltd
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Abstract

The utility model relates to a data acquisition technical field especially relates to a NB-IoT intelligence water gauge data acquisition terminal, including many field data acquisition terminal, private high in the clouds platform, host computer and equipment terminal, interconnect and establish the communication between a plurality of equipment terminals and the many field data acquisition terminal, a plurality of equipment terminals establish the communication through above-mentioned many field data acquisition terminal and private cloud platform, many field data acquisition terminal and private high in the clouds platform establish the communication, this terminal can not only concentrate the collection to report to each field data, also can report to fire control, special situations such as quantity anomaly record and control, convenience of customers looks over and makes statistics with public business bureau.

Description

NB-IoT intelligent water meter data acquisition terminal
Technical Field
The utility model relates to a data acquisition technical field especially relates to a NB-IoT intelligence water gauge data acquisition terminal.
Background
At present, data in necessary fields of life such as water, electricity, gas and the like are collected systematically, so that corresponding meter reading efficiency can be improved, the working quality of a public service bureau is improved, and the user experience quality is improved; for example, the existing intelligent water meter is a novel water meter which measures the daily water consumption of residents by using the modern microelectronic technology, the modern sensing technology and the intelligent IC card technology and transmits and settles the water consumption data, compared with the traditional water meter which only has the functions of flow acquisition and mechanical pointer display of the water consumption, the intelligent water meter has great progress, the intelligent water meter can record and electronically display the water consumption, can control the water quantity according to convention, automatically complete the water fee calculation of the stepped water price and simultaneously store the water consumption data.
For example, the utility model with the patent number CN202020342558.9 discloses a multi-meter data acquisition terminal, which comprises a housing and a circuit board arranged in the housing; the ammeter communication component is arranged on the circuit board, is in communication connection with the intelligent ammeter and is used for acquiring ammeter data; the water meter communication component is arranged on the circuit board and is used for being in communication connection with the intelligent water meter and acquiring water meter data; the gas meter communication component is arranged on the circuit board and is used for being in communication connection with the intelligent gas meter and acquiring gas meter data; the remote communication component is arranged on the circuit board and used for uploading the electric meter data, the water meter data and the gas meter data to a master station; the utility model is characterized in that the utility model is arranged on the circuit board, respectively with the ammeter communication component, the water gauge communication component, the gas gauge communication component and the remote communication component are connected, and will the ammeter data, the water gauge data and the gas gauge data are forwarded to the processor of the remote communication component, the ammeter communication component comprises one or more of a broadband carrier local communication component, a narrowband carrier local communication component and a micropower wireless communication component, the ammeter communication component comprises a Bluetooth communication component for collecting the data of the IR46 intelligent ammeter, the ammeter communication component comprises a 485 communication component, the water gauge communication component comprises an MBUS communication component, the gas gauge communication component comprises a small wireless communication component, the gas gauge communication component comprises an MBUS communication component, the shell is provided with an MBUS interface and a plurality of auxiliary terminals of the MBUS communication component, the auxiliary terminals are used as standby expansion interfaces of the MBUS communication assembly, the data acquisition terminal is arranged on a circuit board, and an electric meter communication assembly, a water meter communication assembly and a gas meter communication assembly which can be communicated with an intelligent electric meter, an intelligent water meter and an intelligent gas meter are simultaneously arranged on the circuit board in the data acquisition terminal, so that in practical application, the data acquisition terminal can be used for simultaneously acquiring data of the intelligent electric meter, the intelligent water meter and the intelligent gas meter, the number of terminal devices for acquiring various intelligent meter data is reduced to a certain extent, and the layout and installation of the acquisition terminal in the meter box are simplified;
as disclosed in the utility model with patent number CN201920499952.0, a multi-terminal data acquisition system is based on, including the control center for receiving data, sending data and processing data, the control center input is equipped with the multi-terminal data acquisition unit for carrying out data acquisition and reception to the equipment of communication facilities to computer input program and data or receiving computer output processing results, the control center is connected and is equipped with the information storage unit for storing and managing the acquired data and the positioning unit for carrying out position determination to the equipment of communication facilities to computer input program and data or receiving computer output processing results, the control center output is equipped with the management unit for inquiring and managing the acquired data and position information, the control center includes programmable PLC, the multi-terminal data acquisition unit includes data collector, The temperature and humidity sensor, the camera, the single chip microcomputer and the first memory, wherein the management unit comprises a mobile terminal and a management computer; the control center is used for processing, storing or sending data acquired by the data acquisition unit, the temperature and humidity sensor and the camera; the multi-terminal data acquisition unit is used for acquiring data through the data acquisition unit, the temperature and humidity sensor and the camera, the first memory is used for storing the acquired data, the single chip microcomputer is used for processing the data, and then the data of the site equipment is sent to the programmable PLC for processing; the management unit is used for carrying out remote management and inquiry through the mobile terminal, and managing a computer to carry out fixed-point office management; the technical scheme includes that the information storage unit collects data acquired by equipment which inputs programs and data to the computer or receives processing results output by the computer through each communication facility and then manages the data, the information storage unit comprises a second memory and a control computer, the positioning unit comprises a GPS (global positioning system) positioner, the GPS positioner positions specific positions of the equipment which inputs the programs and the data to the computer or receives the processing results output by the computer through each communication facility, the programmable PLC connecting end is provided with a single chip microcomputer, a second memory, a mobile terminal, a management computer and the GPS positioner, the single chip microcomputer connecting end is provided with a data acquisition unit, a temperature and humidity sensor, a camera and a first memory, and the technical scheme effectively inputs the programs and the data to the computer or receives the processing results output by the computer through the multi-terminal data acquisition unit and the management unit The data of a plurality of terminal devices can be remotely monitored by accurately positioning, and the positions of the terminal devices are known, so that the management intensity is improved, and the monitoring effect is improved; by arranging the information storage unit, the computer is controlled to manage the data, the information of a single terminal device is effectively stored and managed, loss in the data transmission process is avoided, and the data protection is improved;
as disclosed in the utility model with patent number CN201310361545.0, a wireless hand-held data acquisition terminal based on the MBUS protocol includes: LCD screen, LED pilot lamp, USB interface, program control module, power circuit module and data storage module, its characterized in that: the system also comprises a GPRS module, a buzzer and an MBUS communication module, the program control module is respectively connected with the LCD screen, the LED indicator light, the USB interface, the power circuit module, the data storage module, the GPRS module, the buzzer and the MBUS communication module, the GPRS module uses the SIM900A-GPRS wireless module, can actively connect with the Internet network, tries to connect with the server IP, acquires the network IP, establishing TCP/IP connection, reading data on the hand-held terminal by the master station of the management system, the power supply circuit is powered by a lithium battery, can be charged for multiple times, is energy-saving and environment-friendly, the LCD can display a collected data value, a battery state and a GPRS connection state, the LED indicator light uses 2 green LEDs to respectively indicate the connection state of the main station and the data acquisition result, the buzzer sounds when the data acquisition is successful, the technical scheme can acquire the data of the terminal equipment and simplify the process of acquiring the data of the data terminal.
However, in the prior art, the acquisition schemes in the acquisition terminals are all independent from each other, data acquired by a plurality of terminals cannot be reported uniformly, query work or statistical work is hindered, or problems of low efficiency, unstable system operation and the like exist, and users cannot check data uniformly when inquiring terminal data of equipment such as water meters, electric meters, gas meters and the like, which is very inconvenient; and as the house life gradually moves towards intellectuality, more and more data need to be collected in each field, each type of data is counted alone, the condition that the data is lost or missed is likely to happen, and misjudgment is easily caused, so that a data acquisition terminal based on the STM32L476 is particularly provided to solve the problems.
SUMMERY OF THE UTILITY MODEL
In order to overcome the unable weak point of solving field equipment terminal data acquisition of current scheme, the utility model provides a NB-IoT intelligence water gauge data acquisition terminal, this terminal can not only concentrate the collection to each field data and report, also can report to fire control, and special case such as quantity anomaly are taken notes and control, and convenience of customers looks over and makes statistics of with public service bureau, moreover the utility model discloses except from taking the collection function, can also carry out data collection to other producer wireless products, more facilitate the use and look over.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: an NB-IoT intelligent water meter data acquisition terminal is characterized in that: including multi-field data acquisition terminal, private high in the clouds platform, host computer and equipment terminal, it is a plurality of the equipment terminal with interconnect between the multi-field data acquisition terminal and establish the communication, it is a plurality of the equipment terminal establishes the communication through above-mentioned multi-field data acquisition terminal and private cloud platform, multi-field data acquisition terminal and private high in the clouds platform establish the communication, and multi-field data acquisition terminal is unified with each item data in a plurality of equipment terminal and is uploaded to private high in the clouds platform, establish the communication between private high in the clouds platform and the host computer, establish the communication through wireless mode between host computer and the multi-field data acquisition terminal.
Further, many fields data acquisition terminal is including MCU main control chip, control module, collection module, wireless communication module and power all through the circuit with interconnect between the MCU main control chip, wireless communication module with establish the communication between the private high in the clouds platform.
Further, the control module comprises an external control module, the external control module is in communication with the equipment terminal in a wireless mode, the external control module comprises a relay and a sensor, and the relay and the sensor are connected with the external control module through circuits.
Furthermore, the control module further comprises an internal control module, and the internal control module is used for controlling the on-off of the power supply of each module in the multi-field data acquisition terminal.
Furthermore, the acquisition module is connected with the wireless communication module, the acquisition module comprises a wired acquisition module and a wireless acquisition module, the wired acquisition module is connected with the equipment terminal through a signal line, and the wireless acquisition module is communicated with the equipment terminal in an NB-IoT (NB-IoT) mode.
Furthermore, the multi-field data acquisition terminal further comprises a terminal display, and the terminal display is connected with the MCU main control chip through a circuit.
Furthermore, the terminal display comprises a segment code liquid crystal screen, a liquid crystal driving module, a key and an LED, wherein the segment code liquid crystal screen, the key and the LED are all connected with the MCU main control chip through circuits.
Furthermore, the power supply comprises a main power supply, a power supply module, a voltage stabilizing module and a standby power supply, the standby power supply is connected with the acquisition module, the communication module and the display screen, the output end of the main power supply is electrically connected with the power supply module, the output end of the power supply module is electrically connected with the voltage stabilizing module, the power supply module outputs 12V direct-current power after conversion, and the 12V direct-current power is converted into the service voltage of each module through the voltage stabilizing module.
The utility model has the advantages that: the utility model provides a NB-IoT intelligence water gauge data acquisition terminal, including multi-field data acquisition terminal, private high in the clouds platform, host computer and equipment terminal, a plurality of equipment terminals with interconnect and set up the communication between the multi-field data acquisition terminal, a plurality of equipment terminals establish the communication through above-mentioned multi-field data acquisition terminal and private cloud platform, and multi-field data acquisition terminal establishes the communication with private high in the clouds platform, and multi-field data acquisition terminal uploads each item data in a plurality of equipment terminals to private high in the clouds platform in unison, sets up the communication between private high in the clouds platform and the host computer, establishes the communication through wireless mode between host computer and the multi-field data acquisition terminal, the utility model provides a data acquisition system is including multi-field data acquisition terminal, and this multi-field data acquisition terminal mainly adopts data acquisition main circuit, the main circuit of data acquisition, The data acquisition control circuit, the data acquisition interface and the data acquisition power circuit form a hardware part of the terminal; the software part of the system is composed of a main program flow of the data acquisition system and a flow taking water meter data acquisition as an example, and can realize the overall design of a multi-field data acquisition terminal; and through the experiment demonstration, can effectively improve data acquisition system's stability and reliability, the utility model provides a multi-field data acquisition terminal can not only concentrate the collection to each field data and report, also can report to the fire control, and special circumstances such as quantity anomaly are recorded and are controlled, and convenience of customers looks over and makes statistics of with the public service bureau, moreover the utility model discloses except from taking the collection function, can also carry out data collection to other producer wireless products, more facilitate the use and look over.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of the system structure of the present invention.
Fig. 2 is the utility model discloses well multi-field data acquisition terminal's schematic structure.
Fig. 3 is the utility model discloses the circuit principle schematic diagram of MCU main control chip among the multi-field data acquisition terminal.
Fig. 4 is the utility model discloses the circuit principle schematic diagram of main power source among the multi-field data acquisition terminal.
Fig. 5 is the utility model discloses power module's circuit principle schematic diagram among multi-field data acquisition terminal.
Fig. 6 is the utility model discloses collection module's circuit principle schematic diagram among the multi-field data acquisition terminal.
Fig. 7 is the utility model discloses wireless communication module's circuit principle schematic diagram among the multi-field data acquisition terminal.
Fig. 8 is the utility model discloses control module's circuit principle schematic diagram among the multi-field data acquisition terminal.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly specified or limited, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
FIG. 1 is a schematic diagram of a system structure of the present invention, FIG. 2 is a schematic diagram of a multi-domain data acquisition terminal of the present invention, FIG. 3 is a schematic diagram of a circuit principle of a MCU master control chip in the multi-domain data acquisition terminal of the present invention, and referring to FIG. 1 of the present specification, an NB-IoT intelligent water meter data acquisition terminal and a multi-domain data acquisition terminal thereof shown in FIGS. 2 and 3 comprise a multi-domain data acquisition terminal, a private cloud platform, a host computer and a device terminal, a plurality of the device terminals are connected with and establish communication with the multi-domain data acquisition terminal, a plurality of the device terminals establish communication with the private cloud platform through the multi-domain data acquisition terminal, the multi-domain data acquisition terminal establishes communication with the private cloud platform, and the multi-domain data acquisition terminal uniformly uploads various data in the plurality of device terminals to the private cloud platform, the private cloud platform and the upper computer are connected in a 4 g/Ethernet manner, and the communication network can be realized by NBIot, wifi and wired network, 4g, communication is carried out in the same mode, and uploaded data are classified and sorted uniformly; if the control needs to be modified, the data is issued, and the data and the state stored in the multi-field data acquisition terminal can be modified; the multi-field data acquisition terminal reports data to the multi-field data acquisition terminal at regular time every day, if abnormal data uploading conditions of the multi-field data acquisition terminal are received under special conditions, the data are actively uploaded, the MCU main control chip adopts an STM32L476 single chip microcomputer, the MCU main control chip can keep standby and running states with extremely low power consumption, and the multi-field data acquisition terminal can be normally used within a specified year under the condition of ensuring power supply of a battery.
Example 2:
FIG. 4 is a schematic diagram of a circuit principle of a main power source in a multi-field data acquisition terminal of the present invention, and FIG. 5 is a schematic diagram of a circuit principle of a power module in a multi-field data acquisition terminal of the present invention, such as the main power source and the power module in the multi-field data acquisition terminal shown in FIG. 4 and FIG. 5 of the specification, wherein the power source includes a main power source, a power module, a voltage stabilizing module and a standby power source, the standby power source is connected to the acquisition module, the communication module and the display screen, the output end of the main power source is electrically connected to the power module, the output end of the power module is electrically connected to the voltage stabilizing module, the power module outputs 12V DC power after conversion, and then the 12V DC power is converted into the voltages for each module by the voltage stabilizing module, wherein the main power source adopts 220V AC power source and outputs 12V DC power after conversion by the power module, and then a 12V direct current power supply is converted into the use voltage of each module such as 5V, 3.3V and the like through a voltage stabilizing module, wherein the standby power supply uses a 3.6V battery, mainly comprises an MCU main control chip, a part of acquisition modules, a wireless communication module and a terminal display for supplying power, so that the reporting function of the multi-field data acquisition terminal keeps normal operation under the condition of abnormal power supply.
Example 3:
fig. 6 is the utility model discloses collection module's circuit principle schematic diagram in the multi-field data acquisition terminal, fig. 7 is the utility model discloses wireless communication module's circuit principle schematic diagram in the multi-field data acquisition terminal.
Fig. 8 is the circuit principle schematic diagram of the control module in the multi-field data acquisition terminal of the present invention, as the description attached fig. 7, the wireless communication module of a data acquisition terminal shown in fig. 8, the wireless communication module and the MCU main control chip are connected with each other through a circuit, the wireless communication module in the multi-field data acquisition terminal of the present invention can realize the function of uploading data of the acquisition end, the data uploading of the acquisition module can upload the acquisition information of each field device terminal to the multi-field data acquisition terminal in the manner of lora, sub-1g, etc., for the product associated with the terminal, the address, ID, etc. of the product can be set and operated by the terminal; the multi-field data acquisition terminal is only responsible for relevant data acquisition and arrangement when communicating with other products, and does not change or operate; the acquisition module in the data acquisition terminal can upload data to the multi-field data acquisition terminal at regular time according to the requirements of each field, the control module is divided into an internal control module and an external control module, wherein the internal control module mainly controls the on-off of the power supply of each module in the multi-field data acquisition terminal, and the service life is prolonged by reducing the power consumption by cutting off the power supply, the external control module in the utility model consists of a relay and a sensor, and can realize the functions of controlling a switch valve such as a water meter, the circuit on-off of an ammeter, a switch valve of a gas meter, fire alarm, the on-off of an illuminating lamp, monitoring the safety alarm of the aged, and the like, the acquisition module is divided into a wired acquisition module and a wireless acquisition module, the wired module mainly can support basic equipment such as the water meter, the ammeter, the gas meter and the like, and the acquisition mode is mainly converted into AD, part of the interfaces support a serial port communication reading module to collect data; the wireless acquisition module can support devices such as a fire terminal and an intelligent old age terminal besides basic devices such as the water meter, the ammeter and the gas meter, and can acquire wireless communication data information sent by the device terminal, and the main communication module is NBIot.
Example 4:
FIG. 1 is a schematic diagram of a system structure of the present invention, FIG. 2 is a schematic diagram of a multi-field data acquisition terminal of the present invention, FIG. 3 is a schematic diagram of a circuit principle of an MCU main control chip of the multi-field data acquisition terminal of the present invention, and the schematic diagram of the circuit principle of the MCU main control chip of the multi-field data acquisition terminal of the present invention is shown in FIG. 1, FIG. 2 and FIG. 3, as described in the specification, the NB-IoT smart water meter data acquisition terminal further includes a terminal display, the terminal display is connected with the MCU main control chip by a circuit, the terminal display includes a segment code LCD screen, a liquid crystal driving module, keys and LEDs, the segment code LCD screen, the keys and the LEDs are connected with the MCU main control chip by a circuit, and in a display screen interface of the terminal display, a client can roughly observe various data and alarm records of a plurality of device terminals, and use mobile phone apps or flat clients, the state information of each day and when various abnormal states appear can be checked, and the multi-purpose of one machine can be realized through operations such as management, division, processing, charging and the like.
The data acquisition circuit in the utility model is designed and completed according to a main chip STM32L476, various data acquisition in the data acquisition control circuit utilizes a general I/O port simulation serial port to communicate with each part acquisition module, and a power circuit in the data acquisition system adopts a 3.6V lithium sub-battery to supply power; the utility model provides a multi-field data acquisition terminal can not only concentrate the collection to each field data and report, also can report to fire control, special conditions such as quantity anomaly record and control, convenience of customers looks over and makes statistics with the public service bureau, moreover the utility model discloses except that from taking the collection function, can also carry out data collection to other producer wireless products, more facilitate the use and look over; the utility model provides a MCU main control chip can convert the signal that shows sensor trouble and normal into corresponding demonstration signal, shows on the display screen on the terminal display simultaneously, for example shows "trouble" or "normal".
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (8)

1. An NB-IoT intelligent water meter data acquisition terminal is characterized in that: including multi-field data acquisition terminal, private high in the clouds platform, host computer and equipment terminal, it is a plurality of the equipment terminal with interconnect between the multi-field data acquisition terminal and establish the communication, it is a plurality of the equipment terminal establishes the communication through above-mentioned multi-field data acquisition terminal and private cloud platform, multi-field data acquisition terminal and private high in the clouds platform establish the communication, and multi-field data acquisition terminal is unified with each item data in a plurality of equipment terminal and is uploaded to private high in the clouds platform, establish the communication between private high in the clouds platform and the host computer, establish the communication through wireless mode between host computer and the multi-field data acquisition terminal.
2. The NB-IoT intelligent water meter data acquisition terminal as set forth in claim 1, wherein: the multi-field data acquisition terminal comprises an MCU (microprogrammed control Unit) main control chip, a control module, an acquisition module, a wireless communication module and a power supply, wherein the control module, the acquisition module, the wireless communication module and the power supply are all connected with each other through circuits, and the wireless communication module is communicated with the private cloud platform.
3. The NB-IoT intelligent water meter data acquisition terminal as set forth in claim 2, wherein: the control module comprises an external control module, the external control module is in communication with the equipment terminal in a wireless mode, the external control module comprises a relay and a sensor, and the relay and the sensor are connected with the external control module through circuits.
4. The NB-IoT intelligent water meter data acquisition terminal of claim 3, wherein: the control module further comprises an internal control module, and the internal control module is used for controlling the on-off of the power supply of each module in the multi-field data acquisition terminal.
5. The NB-IoT intelligent water meter data acquisition terminal as set forth in claim 2, wherein: the acquisition module is connected with the wireless communication module, the acquisition module comprises a wired acquisition module and a wireless acquisition module, the wired acquisition module is connected with the equipment terminal through a signal line, and the wireless acquisition module is communicated with the equipment terminal in an NB-IoT (NB-IoT) mode.
6. The NB-IoT intelligent water meter data acquisition terminal as set forth in claim 2, wherein: the multi-field data acquisition terminal further comprises a terminal display, and the terminal display is connected with the MCU main control chip through a circuit.
7. The NB-IoT intelligent water meter data acquisition terminal of claim 6, wherein: the terminal display comprises a segment code liquid crystal screen, a liquid crystal driving module, a key and an LED, wherein the segment code liquid crystal screen, the key and the LED are all connected with the MCU main control chip through circuits.
8. The NB-IoT intelligent water meter data acquisition terminal as set forth in claim 2, wherein: the power supply comprises a main power supply, a power supply module, a voltage stabilizing module and a standby power supply, the standby power supply is connected with the acquisition module, the communication module and the display screen, the output end of the main power supply is electrically connected with the power supply module, the output end of the power supply module is electrically connected with the voltage stabilizing module, the power supply module outputs 12V direct-current power after conversion, and the 12V direct-current power is converted into the service voltage of each module through the voltage stabilizing module.
CN202120424473.XU 2021-02-26 2021-02-26 NB-IoT intelligent water meter data acquisition terminal Active CN215064712U (en)

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CN202120424473.XU CN215064712U (en) 2021-02-26 2021-02-26 NB-IoT intelligent water meter data acquisition terminal

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Application Number Priority Date Filing Date Title
CN202120424473.XU CN215064712U (en) 2021-02-26 2021-02-26 NB-IoT intelligent water meter data acquisition terminal

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CN215064712U true CN215064712U (en) 2021-12-07

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